Bicycle helmet



FIG. 1 is an elevational view illustrating the bicycle helmet of my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left elevational view thereof; and,

FIG. 7 is a right elevational view thereof. 

CLAIM The ornamental design for a bicycle helmet, as shown and described. 